---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-24-048931"
form_type: "8-K"
ticker: null
cik: "0001735948"
company_name: "Greenbrook TMS Inc."
filed_at: "2024-12-10T23:59:59+00:00"
generated_at: "2026-05-29T05:13:50.012207+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Neuronetics completes acquisition of Greenbrook TMS; Greenbrook becomes wholly owned subsidiary

## Summary
- Greenbrook borrowed $1.5M unsecured from Madryn at 0% interest, maturing by Dec 31, 2024.
- Neuronetics acquired all Greenbrook shares; each share exchanged for 0.01021 Neuronetics common share.
- Madryn converted ~$128M Term Loans into 2,309,453,605 Greenbrook shares, holding 95.8% pre-closing.
- Board members Burke, Campbell, Cucuz, Elstad, Leonard, Mann, Tworecke departed; new directors appointed.
- Greenbrook shares removed from OTCQB; combined company trades as STIM on NASDAQ.

## SEC filing metadata
- accession: 0001140361-24-048931
- form_type: 8-K
- cik: 0001735948
- company_name: Greenbrook TMS Inc.
- filed_at: 2024-12-10T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 8.01, 2.01, 2.03, 3.03, 5.01, 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1735948/000114036124048931/0001140361-24-048931-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1735948/000114036124048931/ef20039750_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-24-048931
- JSON: https://secwatch.observer/filing/0001140361-24-048931.json
- Plain text: https://secwatch.observer/filing/0001140361-24-048931.txt

## Key facts
- M&A Transactions
  Greenbrook TMS Inc. underwent a change of control involving Neuronetics, Inc. for 0.01021 of a share of Neuronetics common stock (closed 2024-12-09).
  - Action: change of control
  - Counterparty: Neuronetics, Inc.
  - Consideration: 0.01021 of a share of Neuronetics common stock
  - Closing: 2024-12-09
  source text: Agreement ”) and the Plan of Arrangement, each Greenbrook Share outstanding immediately prior to the effective time of the Arrangement (the “ Effective Time ”) was exchanged for 0.01021 of a share of Neuronetics common stock, in accordance with the terms of the Arrangement Agreement (the “ Consideration ”). A copy of the Arrangement Agreement was filed as Exhibit
  evidence_url: https://www.sec.gov/Archives/edgar/data/1735948/000114036124048931/0001140361-24-048931-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.